Burglar-alarm.



'- UHRITGHFIELD.

BURGLAR ALARM.

APPLIOATIVON HLEDJULY 1. 1909.

Patented Apr. 26, 1910.

attac/wmp v e TE 'al sam cnmrcnrmnn; or NA'rIoNAL MILITARY norm, omo.

emanan-Anania.

Specification of Letters 4Patenti. Application-filed July 1,

Patented apr. 2e, i910.

1909. Serial No. 505,360.

To all whom it may concern:

Be it known that I, SAMUEL GHRITCH- FIELD, a citizen of the UnitedStates, residing at National Military Home, in the county of Montgomeryand State of Ohio, have invented certain new' and useful Improvements inBurglar-Alarms, of which the following is a specification.

This invention relates to certain new and useful improvements in burglaralarms.

The object of my invention is to provide an alarm mechanism, arranged tobe secured to a door, window, drawer or the like to operate an audiblealarm at the point where the alarm mechanism is located as well as beingarranged to operate a second alarm at a point distant from the locationof the primary alarm mechanism.

A further object of my invention is to provide a device arranged to besecured to a'moving member, such as a door, window, drawer or the like,so arranged that when said member' is moved, a cap will be discharged,while at the same time the device will close a normally openy electriccircuit to operate a signal to give a second'alarni at a point remotefrom the location of the rst alarm.

With these and other objects in view, the present invention consists inthe combination and arrangement of parts as will be hereinafter morefully described and particularly pointed out 1n the appended claims, itbeing understood that changes in the specific structure 4shown anddescribed may be made within the scope of the claims without departingfrom the spirit of the invention.

In the drawin s forming a portion of this specification, an in lwhichlike characters of reference indicate similar parts in the severalviews, Figure 1 shows a fragmentary portion of a window frame providedwith my alarm, Fig. 2 shows a` detached horizontal sectional viewthrough the .alarm vmechanism, Fig. 3 is a transverse sectional viewthrough the operating mechanism, Fig. 4 is a front view of the housingdisclosing the location of the several plunging members.

In carrying out the object of my 'invention, -I employ a suitablehousing 10, comprislng two similar sides, a top'and two end plates. Thishousing is provided with the two securing flanges 9, 9 having suitablescrew openings, tie end plate 5 being projected upward beyond the topplate 10 of.

the housing. The top plate 10 has a longitudinal slot, while one of thesidesof the housing as the one marked 1 is also provided with a slot asis shown at 4, the remaining side 1' being imperforate. The rear plate'6 is provided with a central opening 6', which -registers with asimilar opening 2 -within the front plate 5 as shown. Slidably heldwithin the openings G and 2, is the bolt 11, this bolt having itsforward end reduced length the bolt is provided with the opening 20square in outline and thepin opening 21. As shown the top 10 of thehousing is fiat and heldin alinement with the top 10 is a" p squareopening 4 within the front plate 5.

Slidably held to the top 10 is a plunger 14 rectangular in cross`section which is arranged to project through the opening. 4 as shown.This plunger 14 is provided with two openings marked 22 and 23respectively, the .opening 22 being square in cross section through theslot within the plate top 10Jand the square stem 25 of the operatinghandle 26, this stem 25 extending t irough the bolt as shown.

Surrounding the bolt 11 and held between the stem 25 and the`rear plate6, is the protractile spring 28.

tangular opening 4 as disclosed. In referring to the drawings it will benoted that the plunger 14 extends a considerable dis tance beyond theend 11 of the bolt.

- Held within the pin opening 21 within the bolt, is the lsecuring end30 ofl an approxi- .'s held approximately in alinement with the end ofthe plunger 14. The portion 33 of this contact maker extends through theopening 3 within thefront plate 5 of the housing and is slidably guidedtherein.

The housing as described is securedto a dow frame B at afpoint above thelocation of the housing, is the rub. plate 35 having the securing,flange 36 through which the screws 37 arecarried in securing this rubplate. This plate is preferably countersunk within the side stile of thewindow frame B. As shown in the drawings, this rub provided with thesquare opening 3 '-ofa extending through lthe bolt opening 20, is-

as shown at l11 while approximately midand held within this opening 22and passing '.The plunger 14 is guided within the recmately L-shapedresilient member 31 form-v/" ing a contact ar1n,.the upper end 32 ofwhichv suitable part of the window sash A as shown, y in Fie; 1 forinstance,.an,d fixed to the win' plate is size to receive .theprojecting end of the plunger 14, and held adjacent to this openmg 37 isthe lug 38 having a central bore Within which is held a cartridge 39, avent opening 40 lleading from the cartridge-receiving opening to permitthe escape of the gases when the cartridge 39 is exploded. Located abovethe rub plate at a suitable point, is an ordinary p ush button 43carried within the frame 42, from which push button extend the twoelectric conductors 44 and 45 which are led to a suitable electric bell47.

The circuit formed by means of the conductors 44 and 45 is provided witha suitable battery 4G.

The bell 47 is located at any suitable point where it is desired thatthe alarm should be given in case the window or other member to whichthe alarm operating mechanism is secured is actuated. f

lVhen it is desired yto set the alarm mechamsm, the stop pin 50 which isnormally held within the openingl Q3 within the lunger lLl is removed.This pin is locate and held to the rear of the upper portion o'l' thefront plate 5, so as to hold the mechanism in an inoperative position.On the removal of this pin 50, the plunger as well as the connected boltis forced forward so that the end of the plunger ll contacts with theside stile or" the window frame. Now the instrumentalities are soarranged that the opening 3T within the rub plate is in the path of theforward end ot the plunger 14,

so that when the window is raised the phmger end finally plunges throughthis opening 3T being propelled by means oit the spring 2S, in whichoperation the end of the j bolt contacts with the cap or blank cartridge3f) within the lug` 3S and explodes the i lsame. t the. same time vthatthe Jforward end of the bolt came in contact with the cartridge Si) theupper end 252 of the yielding contact arm is forcibly carried againstthe push button 423 and held in contact thereg with to close thenormally open circuit and 1 rl`he bell 4T thus ring the electric bellll". will be rung` as long as the arm is in contact with the pushbotton. The window then is held in a locked position by means ot theplunger 14.

From the foregoing it will be noted that l provide the window or othermember with an auxiliary lock or bolt-mechanism arranged to actuate anexplosive. as well as an electric alarm.

Having thus described my said invention,

-said bolt, a resilient member carried by said bolt, a normally openelectric circuit arranged to be closed by said resilient member in oneof its positions, and a cartridge holder secured to said frame in'thepath of said bolt, an opening being located in said frame, adjacent tosaid cartridge holder in the path of said plunger.

2. The combination with a movable hous` ing, of a spring bolt heldwithin said housing and projecting beyond one end thereof, a plungerslidably held to said housing, an operating stem connecting said plungerto said bolt, a resilient member carried by said bolt, a terminal of anormally open electric circuit in the path of said resilient member, arub plate provided with a plunger opening in the path of said plungerand a cartridge holding lug placed proximal to said plunger opening andin the' path ot said bolt, as and forthe .purpose set forth.

3. In a device of the character described, the combination ofthefollowing instrumentalities, to wit: a movable-housing, a boltslidably held within said housingand projccting` beyond one end thereof,a protractile spring surrounding 'df bolt to normally force said bolti'n onetlirljri ion, said housing having a top and au sii/de ,shin-aplunger slidably held'to the side 'of said housing, an operating lpincarried by said plunger and passing through said side slot, and securedto said bolt and serving as a stop to said spring, a' resilient membercarried by said bolt aifideitending through said top slot, a rub pla'te,having a plunger opening in the path ot' the plunger, a cartridgereceiving lug in the path ot' said bolt, and a contact maker ot ,anormally open electric circuit in the path ot' said resilient member,all arranged substantially as and for the purpose set forth.

lu testimony whereof I atlix my signature, in presence of two witnesses.

h's SAMUEL l (,l lltl'lCllFlELD.

mark lVitnesscs ot mark:

lc'rnu iSanazlN, Ciinis'rornnn C. CLOUD.

